When penniless businessman Mr. Bedford retreats to the Kent coast to write a play, he meets by chance the brilliant Dr. Cavor, an absentminded scientist on the brink of developing a material that blocks gravity. Cavor soon succeeds in his experiments, only to tell a stunned Bedford that the invention makes possible one of the oldest dreams of humanity: a journey to the moon. With Bedford motivated by money, and Cavor by the desire for knowledge, the two embark on the expedition. But neither are prepared for what they find; a world of freezing nights, boiling days, and sinister alien life, in which they may be trapped forever.